<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8" />
		<title>何为数据代理</title>
		<!-- 数据代理:通过一个对象代理对另一个对象中属性的操作(读/写) -->
		<script type="text/javascript" src="../js/vue.js"></script>
	</head>
	<body>
		<script type="text/javascript"">
			let obj1={x:100}
			let obj2={y:200}
			 
			 Object.defineProperty(obj2,'x',{
				 get(){
					 return obj1.x
				 },
				 set(value){
					 obj1.x=value
				 }
			 })
		</script>
	</body>
</html>